Common Mistakes Which Every Angular Developer Should Avoid

Table of Content

• Failing to Unsubscribe
• Involving jQuery
• Unable to use Available Tools
• Not Organizing Codes
• Endorsing the Same Component in Every NgModule
• Manipulation of DOM
• Making use of Client-side Pagination
• Irrelevant Commit Messages
• Failing to Examine
• Forget using Batarang
• Improper use of Event Handlers
• Failing at Adequate Testing

AngularJs developers witness issues of having best practices in hand but the approach towards using them is not perfect. To avoid the mistakes they make by not following standard methods for putting the best Angular app development practices into life, here we will discuss some of those mistakes and the solutions that can be used.

Top 12 Mistakes Every Angular Developer Must Avoid

1. Failing to Unsubscribe

Whenever an Angular developer uses any subscription for events in the application, they generally forget to unsubscribe it. And this results in memory leaks in the entire system. Besides this, sometimes it happens that for creating some features for the application, the developer might subscribe to any tutorial to learn and adapt it. But then they forget to unsubscribe it and this can lead to the usage of unnecessary money. Therefore, whatever the case be, the developers must be careful about if they don’t want anything to happen with the system or save money.

2. Involving jQuery

For developing mobile and web applications, developers use jQuery. It is a standard library that allows the development company to manipulate DOM. But when it comes to Angular applications, jQuery is not the perfect solution. And this is something that AngularJs developers forget. The reason behind jQuery is not the best thing to solve Angular applications’ issues is that Angular itself has many features that can adequately solve problems by using third-party libraries.

3. Unable to use Available Tools

When an Angular development company hires a new developer, the most desired parameter during the hiring process is to see how effectively the Angular developer is able to use different development tools that are available in Angular. Some of the common tools whose knowledge is required are Protractor and Test Whiz. And if the company hires a developer who cannot use these tools, then it will be a costly mistake as using these tools is necessary.

4. Not Organizing Codes

When a developer is working with Angular, the most important thing is to distribute codes into smaller components to make error tracking an easy task. But not all developers can do that. And one of the reasons behind it is that AngularJs works with MVC architecture and it has the tendency to put a huge amount of coding part on the controller.

5. Endorsing the Same Component in Every NgModule

One of the most common mistakes that AngularJs developers end up making is declaring the same component in multiple NGModule-s. The reason behind it is that they need to declare each component in its own NgModule and to make it available for the views, it must list it in the @Ngmodule.declarations array.

The developers forget that if they want to declare the same component in multiple modules, then they must consider the relationship between the modules. For instance, they should see that the modules have a parent-child relationship with each other. If this is the case, then:

• If the developer wants to declare the HeroComponent, they must use the child’s NGModule.declaration.
• To import child modules, they must use the parent’s NGModule.imports array.
• To export HeroComponent, AngularJs developers must use the child’s NGModule.exports array.

6. Manipulation of DOM

Sometimes Angular development service providers make mistakes by directly changing the DOM or from the controller itself. As we know that changing the DOM is a common job while the developers are using the JavaScript platform, they should take care of the following things:

• Refresh the title of the page as the context of it changes.
• Execute SVG
• Concentrate on controlling the system after a validation error.

The list of these possibilities may go on as per the requirement of the system or the working style of the system. Therefore, whenever a developer finds such situations in the platform, they should immediately find an easy escape and then manipulate the DOM. And if the developer doesn’t want to directly alter the DOM, they can use jQuery as a global document object.

7. Making use of Client-side Pagination

Data rendering is something that enables the Angular development companies to maintain the representation of bulk data in the app. When they use client-side pagination for the first time, they have to load the entire data of the application. Therefore if the data is less, then loading is easy but if it is more then, it becomes challenging to load the data. The alternative for this is server-side pagination.

By using server-side pagination the developer can predominantly solve this issue. In server-side pagination, the system can hit the specific page number and load the specific page’s records as per the direction.

8. Irrelevant Commit Messages

A single irrelevant commit message can sometimes change the entire code as it can confuse the code reviewers. Besides, it remains also challenging for the AngularJs developers to find the exact part where they need to revert the new changes. Therefore, it is advisable to avoid giving irrelevant commit messages and not to forget to follow proper standards from git.

9. Failing to Examine

The developers overlook examining the application before launching it is one of the commonest mistakes that is made by AngularJs developers. They do not see to it that there might be bugs that get launched by many environments. Therefore, if they don’t have to obtain an environment with each operating system but they need to examine the app by using cross-browser app testing tools.

10. Forget using Batarang

Batarang is a Google Chrome extension. AngularJs developers use it to create and debug Angular apps. Batarang is really helpful when the developers want to apply it to abstracting scopes where they find out that the arguments are restricted. But the majority of the AngularJs developers fail to use this extension tool and this can be a huge mistake.

11. Improper use of Event Handlers

When the developers need to add the functionalities that they found on predicted data like adding a button that depends on user input, Angular is one of the best technologies. But this doesn’t go with the standard rules of the Angular framework. As the standard rule is to place all the display and logic in proper order.

12. Failing at Adequate Testing

After the app is developed, the majority of the AngularJs developers forget to test the application in cross browsers. But if they test it they might find bugs that can be launched with the application. Therefore, testing the application using multiple environments is very important. Some of the online tools for this are LambdaTest tools or BrowserStack test tools. Besides these, there are more than 2000 tools that enable the AngularJs developers to test the application and make it perfect for cross browsers.

Conclusion

Making mistakes while coding is very common with any developer. Sometimes it happens that developers write the code and when they check it after a few days, they can point out various mistakes in it. But the problem arises when the developer cannot find out their mistakes and later the end-users face problems in using the application. Therefore, the above-listed mistakes can help the AngularJs developers be more careful while creating and debugging an app.